Alert archive / New Jersey / Mesoscale Discussions in 2014

Mesoscale Discussion 1831

October 7, 2014Kent County, New Castle County, Sussex County, Delaware; 5 counties in Maryland; 6 counties in New Jersey

The Storm Prediction Center issued this mesoscale discussion at Oct 7, 2014, 11:06 PM EDT for Kent County, New Castle County, Sussex County, Delaware; 5 counties in Maryland; 6 counties in New Jersey. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Oct 7, 2014, 11:06 PM EDT (03:06 UTC)
Expired
Oct 8, 2014, 12:30 AM EDT
In force
84 min
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Kent County, DE, New Castle County, DE, Sussex County, DE, Caroline County, MD, Dorchester County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Atlantic County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 13 km from the middle of the area, began a volume at 03:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 3.1 hours before the alert went out and 100 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Wallops Is Stn, VA at 00:00Z on 2014-10-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 96 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Wallops Is Stn, VA at 00:00Z on 2014-10-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 146 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
96 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
1222 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
146 m²/s²
0-3 km storm-relative helicity
190 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 7, 9:17 PM EDTMesoscale DiscussionSPCCharles88 min

Nearby

Mesoscale Discussions in New Jersey, 2014Mesoscale Discussions in Maryland, 2014Mesoscale Discussions in Delaware, 2014Every mesoscale discussion in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.